1.   When the blisters burst, they release virus particles that infect healthy animals.

2.   Each spring, summer and fall, tiny particles are released from trees, weeds and grasses.

3.   If so, plutonium dioxide could be released into the atmosphere and fine particles could be released.

4.   Project engineers reported that excessive pressure by an air-conditioning system tore foam insulation encased in aluminized foil, releasing foam particles.

5.   Some will release particles and metamorphose into entirely different elements, and they do so at a predictable rate.

6.   That might release radioactive particles outside repository via air or water.

7.   These particles are released from the cells and can then infect other cells, spreading the infection throughout the body.